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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3697) check port availability when starts kylin instance
Date Tue, 20 Nov 2018 13:46:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16693251#comment-16693251
] 

ASF GitHub Bot commented on KYLIN-3697:
---------------------------------------

shaofengshi closed pull request #353: KYLIN-3697 Check port availability when starts kylin
instance
URL: https://github.com/apache/kylin/pull/353
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):

diff --git a/build/bin/check-env.sh b/build/bin/check-env.sh
index cd745d4526..5b14e0af7d 100755
--- a/build/bin/check-env.sh
+++ b/build/bin/check-env.sh
@@ -80,4 +80,7 @@ then
     then
         quit "Failed to create $SPARK_HISTORYLOG_DIR. Please make sure the user has right
to access $SPARK_HISTORYLOG_DIR"
     fi
-fi
\ No newline at end of file
+fi
+
+${KYLIN_HOME}/bin/check-port-availability.sh ||  exit 1;
+
diff --git a/build/bin/check-port-availability.sh b/build/bin/check-port-availability.sh
new file mode 100644
index 0000000000..023fdef3b9
--- /dev/null
+++ b/build/bin/check-port-availability.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+source $(cd -P -- "$(dirname -- "$0")" && pwd -P)/header.sh
+
+
+# get port from configuraton
+kylin_port=`grep "<Connector port=" ${KYLIN_HOME}/tomcat/conf/server.xml |grep protocol=\"HTTP/1.1\"
| cut -d '=' -f 2 | cut -d \" -f 2`
+
+# check the availability of the port
+kylin_port_in_use=`netstat -tlpn | grep "\b${kylin_port}\b"`
+
+# if not available, prompt error messeage
+[[ -z ${kylin_port_in_use} ]] || quit "ERROR: Port ${kylin_port} is in use, please check
the availability of the port and re-start Kylin"


 

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> check port availability when starts kylin instance
> --------------------------------------------------
>
>                 Key: KYLIN-3697
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3697
>             Project: Kylin
>          Issue Type: Bug
>    Affects Versions: v2.5.1
>            Reporter: May Zhou
>            Priority: Minor
>
> As I ran the script and it turned out with no error message, and I ran the kylin.sh start
script, the console output indicated that a kylin instance had successfully started, but when
I visit the <host>:<port>/kylin, I found another service was running rather than
kylin.
>   
>   I can only find the error message in the kylin.out, which is not so user-friendly.
> > Caused by: java.net.BindException: Address already in use (Bind failed)
> 	at java.net.PlainSocketImpl.socketBind(Native Method)
> 	at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)
> 	at java.net.ServerSocket.bind(ServerSocket.java:375)
> I am wondering why check-env does not check the availability of port, and the error message
could be threw out more user-friendly.



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